Improvement in oil-well reamers



" aient @titille To all wheat it may"concern,-`

ND oAnNOr nrEN'rON, OHIO. y

or CLEVELAND,

Letters Patent No. 104,649, dated June 2l, 1.870.

" IMPRQVEMBNT In4 ora-WELLREAMERS.

The Schedule referred to :in these LettersV Patent and. making part of the same l Be it` `known that we, lloIN Rice, JOSHUA a HALL, and CARNOT, "1?. BENTON, of Cleveland, inthe county of Cuyahoga and `State of Ohio, have invented ,a certainnew andimproved Oil-.well Beamer; andwe do `luareby declarethat the following is a full, clear,

`and completeydescription of the same, reference be- 1mg had tothe accompanying drawing making part of `this specification, inwhich drawing* Figures l and 2 are sideviews of the rcamer,-with `the cutters closed.`

`Figure 3 isa view of the Teather, with the cutters expanded. l

. Like letterslof-lreferencerefer to likeparts inthe several views. v

` l l Objective. f

" l `lhis invention relates to an apparatus for enlarging` the diameter of oilfwells, beginning `at any required distance below the mouth of' the well, and extending l fthe enlargement `downward `to any desirabledepth.

" Said apparatus consists of a pair of cutters secured `to the-extreme ends of apair of pivbtedlegs, the up` per ends of" which are so operated by certain `levers actuated by a screw that` the saidarms and cutters may be expandcdrnore or less, as hereinafter described.

, y q Descriptive.

A B representa, pair ot' legs, the npperends of which are pivoted between the cheeks of the stay C, at the point ai q 9D `is apairof levers pivoted inthe upper end of the stay, at the`p0ints I), thelower endsof which descend belowlthe` upper ends of the legs, and rest against them, as-shown `in the" drawing. ,l The upper ends of thelever's D are connected to a screw, E, bymeans of the links F, one end of which being pivoted to the `end'gof the levers l), whereas the opposite end is pivoted to a nut, G, fig.'2, in which l the screw works,as and fora purpose presently shown.

`.lo each `of the lowerjends of the legs A Bis secured the cutters I, `projecting downward at anangle fromthe side offthele'g,and `provided with a slanting sharpcutting-edge, c, iig.j2. A detached view of such of rotation. l

Extending from the cutter is luglI, with a space,

If', adjoining." The lugsfl ofthe cutters ii't into'a mortis'e of thelegsA B, ador-about rightan-gles thereto, and that 'portion of the'said legs below` the mortise fits intothe space Iof the cutters. The object of this 'forni of cutter and mode of attachment is to prevent clogging'and to secure the cutters in place by the lateral pressure in working the reamer, `and atthe saine time 4a ready and easy Inode of adjustingl the cutters.

. J, 'gs. 1 and 3, is a pair of links, the lower ends cf which arepivoted to each other, whereas their Lupper4 ends are pivotedeach to one side of a leg by means of a lug, K, projecting therefrom.

L is a spring connecting the lower en'ls of the links to the -lower end of the stay C above referred to. One pair of such arms and spring are attached to each side of the legs, as shown in.fig.v2.

\ Operation.

VVAs above said, this apparatus is forenlarging the size of oil-wells, or other wells of an artesian class, at any required depth below the mouth ot' such wells, thereby saving the time,'expense, and labor of elilargng the entire bore for the purpose of increasing a certain required distance ofthe lower end only.

Into the well to be enlarged the 'reamer is lowered' to ythe required depth at which the enlargement is to commence by attachingv it to rods' of the proper length, by means ofthe screw M.' At this descent of the apparatus the legs are closed, as shown in iig. 1. This closing together of the legs is eiected by thev screw E, which, on being turned in the proper direction, will bring -the nut G to the position shown in iig. 1, in which it will be seen that the links F are in -alhorizontal position, thereby throwing outwardly the upper arms of the levers D, and inwardly the lower arms thereof, against the .upper ends of the legs `A' `B',`the resultof which is the closing together ot' the lower ends ofthe legs and cutters, as shown in iigs. 1

and 2.

. In this contracted state of the apparatus it is easily lowered into the well to the desired point at which to commence the enlargement. 'lhis point being reached, the cutters are ek-panded by distendingl the legs, which, as will be obvious, is done by reversing the action ot' the screw E, thereby allowing `an outward movement of the lower ends of the levers D, releasing their pressl nre uponv the legs, which will now be thrown apart by the tension of the springs L. Said tension is obtained bythe closing togetherof the legs, in consequence `of the compression of the levers against their upper ends, which, onfl being released therefrom, the spring contracts, thereby drawing upward upon the links, and

causing a distension ot' the legs, as aforesaid.

It will be obvious that by this means the cutters The working of this reamer is like that ordinarily practiced in boringr with a drill, and the same mechanisin employed for giving the reciprocating vertical action to the drill can he as readily applied to the reamcr, the roaming beingr eiected by the cutting down the sides ofthe bore by a succession of strokes,

chipping oft' from the sides of the well chips of more' or less thickness, according to thel set -o`f the reamer.

It willbe obvious that on working the reerncr its movement npwardfwill be free, in consequence of the ability1 of the cutters to close together, should they impinge upon the sides of the well or any obstruction that may be therein, whereas on its descent the sharp l angular cutters will tend to draw into thesides of the By this meansV the sides ofthe well may be out away to any desirable extent, and to any distance downward, without enlarging the entire bore from its mouth down to where the enlargement is required to be made. y

In order to protect the screw-levers, 86e., from iujury and dirt while in active operation, a shield, M, iig. 1, is placed on over the reamer, thereby inclosiug such parts thereof included in the dotted linesi Claims.

What we claim as our invention, and desire -to secure by Letters Patent, is-

' 1. The levers D D, as karranged in coinbination with the adjusting-screw E and legs A B, inthe man ner as and for the purpose set forth.

. 2. l'lhe cutters I, constructed as described and ar ranged, in combination with the pivoted legs A B and links-J, operating conjointly as and for the purposes substantially as set forth.

3. The arrangement of' thc links F. F, nut G, with its screw E, pivoted levers D, incombiuation with the pivoted legs A B, links J, and springs L, operating conjointly as and for the purpose substantially as described.

4. The 'combination of' the rcamer and shield M, substantially as and for the purpose specified.

JOHN RIGG. J. E. HALL. O. lt. FENTON.

Witnesses:

J. HjBU'Rnrnen, l). L. HUMPHREY. 

